Five compounds - chrysophanol, emodin, physcion, aloe-emodin and rhein - were isolated and identified spectroscopically (UV, IR and MS) and by comparison of the melting points with those reported for chrysophanol, emodin, physcion, aloe-emodin and rhein.

Look at Hinter-rhein, far down below there, like a toy village, and that vast desolate valley, with the grey river rushing through it, and the green glacier at the end, and these awful snow-covered peaks all round -- _look_, man!